Typewriting machine



HAGLSIM Oct. '9, 1923.

E. B. HESS TYPEWRITING MACHINE Filed Dec. 17 1921 Patented Oct. 9, 1923.A

UNITED STATES EDWARD JB; HESS,y OF MANHATTAN BEACH, NEW ORK, N. Y., ASSIGNOR TO ROYALl `'1*YIEWRITER COMPANY, INC., OF NEW YORK. N. Y., A CORPORATION OF NEVI' YORK.

.PATENT Y OFFICE.

' TYPEW'RITING MACHINE.

Application nled December 17, 1921. Serial No. 522,910,

To LZ-Z whom t may concern.'l

Be it known that I, EDWARD Manhattan Beach, in the county of Kings,

.and Statev of New York, have invented certain new and useful Improvements 1n Typey writing Machines, or' which the 'following is specification. f

l move Vthe type bars`^toward the platen with,

This invention relates to typewriting machines of the front strike, visible kind, in

kwhich' theftype bars are inipelled to the.

printing point on the platen by kthe depressionof the key levers which are connected .Y

to theheels of the type bars by flexing con-V nections which. are of such nature asto vaccelerated velocity.' kSuch mechanism,

broadly considered, is found in all Standard `Royal machines, and. in the machine nowiin use and shown in'my Patent'No; 1,390,708 of September 13,1921, Ivhave illustrated an arrangement of `fiexing connectionsl between rthe key levers and the tvpe bars whereby the Y machines, the type bars are operated by pullv links, the front ends Yof rwhich are connected l Lto short front links or arms pivoted tomo've about ,a fixed aXis in the front part of the' machine, and these front links or arms are connected by vertically arranged .links toA ythe key levers, .theconnections beingmade ,with the'front links at the upper endsof the vertical links, and no provision ismade for 'moving the front links andthe vertical links to a dead center or toggle lockingV position to produce the results specified in my patent above mentioned. In said patent, however, a construction is shown whereby said toggle lockingr or dead center position is obtained between the pivots of the type bars and the pivotal connections of the pull Ylinks with the .type bars and with the front' levers.:

By my present improvements a change has been made inV these connections whichuare such as to cause the toggle locking condition to be produced between the front links, and

the vertical links, so,V that when a key leveris depressed the associated type bar is moved B. Hrss,`a .citizen of theUnited States, residing at.

v b v dotted lines'.

to a position considerably in advance of the platen, the further movement of the type bar-to` the'platen being caused by the momentum thereof. p

Preferably the horizontally Yarranged null links, which are connected at their rear ends to the heels of the type bars, have their `iront ends connected to the upper endsof 'vertically arranged links, the lower ends lof Vwhich are pivot-ally connected with the keylevers. Short levers or arms are pivotally mounted in front of the vertical links and are pivotally connected with said vertical links between their upper andlower ends in such manner that when the keys are ,Vde-. V

pressed, the typev bars are operated in the manner before. described, `that is, to .move them toy a position considerably in advance of theplaten, the further movement ot the type Ybars to the platen being caused by their momentum.

The type action is associated with universal bar mechanism which operates the escapement, the universal bar being operated by thevertical links during the momentum period ofthe type bars. f

In connection with this mechanism I employ an adjustable plate which is constructed to serve as a combi guide for the key levers and also as a support for the front ends of vspringsattached to the short lever arms and which assist in returning the parts to normal position.

The type action is well' adapted for use in a machine where the platen is set low and .is mounted in a carriage which is shifted obliquely.

In 'the accompanying drawings:

Figure 1 shows aV vertical section through parts'of a typewrting machine embodying vmy improvements, the positions of some of the parts at dilferent times being indicated Figure 2 is a detail `view showing byiull lines the position of certain parts at the commencement of the momentum period, and

by dotted lines the position ofsome of these parts during the movement of the type bars to the printing point. y y y The platen A is mounted inV a carriage, part of which is indicated at B. Thel front portion oit the carriage is supported by a shift rail C andthe carriage rail Fis'con# nected therewith by devices D of-well known construction,` A ball Vbearing E is inter Vet way, while the carriage may be shifted obliquely` tor case printing, it moves horizontally for letter spacing in a plane which 1s Vtruly horizontal. us l The type bar `segment G is arranged obliquely .and is providedwith a type bar guide H as shown. Type bars I are pivotally connected to the segment at z' and their vouter ends are supported by a cushione'dtype -bar rest J. Normally the type-bars are inclined from their inner rear ends upwardly and forwardly as shown, andjwhen oper- 'lao ated by the keys, they pass over the vertical line extending through the type bar pivo ts tothe point No. l and are then moved :bytheir momentum-to the point' No. 2 when i thely impingev the plateii khe key levers K are pivotally connected at their innervends -rto a traine L and they f "are connected with the type bars by the new type action shown, comprising pull links M, vertical links N, and short arms O. The arms O are preferably,though not neces- Y sarily, of the shape shown and they are all mounted on a horizontally arranged roda supported in the frame piece O.: The upper front ends of the arms O are connected by springs P to ar'verticalv plate P pivotallv mounted at p on the trame O.l A. rod

has an'eccentric Q bearing against the rear face of the plate and may be turned or adjusted to vary the vtension of the springs I). The plate P is prolonged downwardlyto form a comb guide for the key levers. Each arm O is connected by a vertically arranged link N with an associated key lever. EachV llnk extends upwardly and rearwardly from its 'connection kwith the key leverand its upper end is connected by a horizontally arranged pull link M with the heel 'of an associated typebar. It' will be observed that the pivotal connection between the link NA vand the short arm 0 is made below the point .'where said link N isV connected with the pull link.

t The type bars are normally held in their `Vlower position by springs S attached to their heels and connected with the trame part S.

When a key lever is depressed to the position shown by dotted lines in Figure 1, the

`associated link N is moved to the position shown by dotted lines in the same figure. v The pull' link is also moved to the dotted f line position indicated and the type'bar is` 4 05' ais'ed to position No. l, which it will beob-4 `ers u depending from the rod o;

served .is behind the vertical line iv passing through the pivots ot the type bals. The further movement of the typel bar to the platen is caused by its momentum, and this movement is also assisted by gravity, as

the type bar passes the vertical plane abovel the pivot-s of the type bars and this assistance afforded by gravity occurs during the latter portion of the momentum period and also thereafter. In this way the movement ol the keys is cushioned and the operation is facilitated.V Y

When a type bar reaches position No. l, Y

y the parts M, N and O are in the position shown by tull'lines in Figure 2, but the momentum oi the type bar causes it to assume the position shown at y and the parts M and 'N assume the position indicated at fm. and a in Figure VWhen the parts M, N [and O are in the position indicated by Jfull lines in Figure 2, the joints or pivotal connections between the link N and the key lever, and between said link and the pivot of the arm O are inline with each other, which is af toggle Vlocking or dead center position and this condition is changed when the type bar is moved by its momentum to the platen. In this wayV a very effective type action is produced which causes the type bars to operate Y i on the platen with reduced noise and as will?, be apparent from au inspection ofthe drawings, it is especially'adapted-to an oblique strike machine where the platen yis set low and occupies a position in a. plane considerabl behind thel type bar pivots. Y

Iiscapement Amechanism is indicated generally at T. It is-of well known constructionV and is operated by universal bar mechanism of novel construction.A As shown, a front bar or universal bar proper, .indi-- cated by the letter U, is supported by hangp An arm u,-extending downwardly from the bar Il, is connected by a link V with a vertical lever W pivoted at its lower endtoa bracket at w. An arm w of this lever, which *extends upwardly andl rearwardly therefrom,

'is connected by an adjustable link Y with the rocker plate Z of the escapement mechanism. A spring Z', attached to the rocker platevv and'to an arm -t of the escapement traine returns the rocker plate and the universal bar mechanism to normal position. Normally the 'links N are out ot contact with the universal bar U. Vhe'nv the links are moved to the toggle locking position indicated by t dotted lines in Figure l and full linesv iii Figure 9., the links N come in contact with the bar U and thenV asthe'upper ends ot the links N` are moved forwardly, the universal i bar is moved in the manner indicated in Figure 2 and the escapement is operated; y

It will be observedthat the type bars are moved aV considerable VVdistance toward the platen beit'ore the universal bar is operated A i is avoided.'

so that the universal bar mechanism is actuated during the latter part oilthe movement of the type bars to the platen. Preferably and actually as shown in .the drawings, such movement of the univ-eral bar is caused during the momentum `ieriod oi the type bars. vnthis way double printing or imperfect printing oi" a similar character The connections between the universal bar -mechanismand the escapment mechanism erationv of the mechanism. This is indicated by dotted lines in Figure l.

Nhen the earriage israised forupper ease printing, the escapment mechanism 4is raised with it and the link Y Yis moved to the dotted line position shown, and in such position the meelanism is in Ycondition to operate in the same manner that it does when the carriage is in lower case position.

I claim as my invention:

l. In a typewriting4` machine, theV combination with 'the key levers and the type bars, of `links connecting the key levers and the type bars, arms pivoted to move Yabout a horizontal axis in fornt oi the links and connected therewith, springs attached to said arms, a pivoted plate in front ot' said arms, and means for turning the plate about its pivotal axis to adjust the tension of the springs.`

2. Ina typewriting machine, the combination with the key levers and the type bars, of links connecting the key levers and the type'bars, arms connected with the links and pivoted to move about a horizontal aXis'in front of the links, springs attached to the arms, a vertical plate pivoted to move about a horizontal axis in iront of the arms to which the springs are attached, and means for turning the plate about the anis of its pivot to adjust the tension of the springs.

3. In a typewritingfmaehine, the combination with the key levers and the type bars, of links connecting the key levers and the type bars, arms connected with the links and pivoted to move about a horizontal axis in front'of the links, springs connected with the arms, and 'a vertically arranged plate mounted to move about a horizontal. axis in front ot the arms and to which the springs are connected, said plate being formed at its lower end with a comb guide for the key levers.

fi. In a typewriting machine, the combination with the key levers and the type bars.y` ot escapement mechanism, arms pivoted to turn about a horizontal axis near the front of? Vthe `machine, connections between the key. levers and the type bars in-v cluding links pivoted to said arms, and universal bar mechanism including a bar in front of said links, a lever, and means con@ necting said lever to said 'bar and to said esrapement mechanism.

In a typewriting machine, the combination with the key leversand the type bars, of escapeinent mechanism, arms pivoted to turn about a horizontal axis near the liront ot the machine, connections between the key levers and the type bars including links pivoted to said arms, and universal lar mechanism comprising a vbar in trent ci said links and actuated. unereby, a lever mounted in the rear of the key levers, a link connecting said bar and lever, and Va link connectingsaid lever and the escapement mechanism.

6. In a typewriting machine, the combination with the key levers and the type bars, ot escapement imechanism, short vertical links pivotally connected with Ithe key levers. long horizontally arranged links connecting said vertical links with the heels of the type bars, arms mounted to move about a horizontal axis and pivotally connected with the vertical links, and universal bar mechanism comprising a front bar with which the linksmake contact when the key levers are depressed, aiA lever, a link connecting it with said universal bar, and a link connection between said lever and the escapement mechanism, the connections between the key levers and the type bars being` such that when a key is depressed, the associated type bar is moved to a toggle locking position in front of the platen and at a considerable distance therefrom, the further movement of the type bar to the platen being caused by its momentum during which momentum period the eseapement mechanism is operated. Y Y

7 In a typewriting machine, the combination with the key levers, the type bars. and connections therebetween, of an obliquely arranged segment to which the type bars are pivotally connected, a platen carriage mounted-to move obliquely and carrying the upper member of a ball race,'and a shift rail mounted to move obliquely for case printing and. provided with the lower mem-v ber of the ball race, the opposing surfaces of said members lying in horizontal planes.

8. In a typewriting machine, the combifrom the platen. 'from which position it completes its travel by momentum alone, thus reducing noise.

9. in a typewritmg machine, the combination with a key lever and a type bei', of e vertical link pivotally connected with the key lever, a horizontal link pivotully con* nected to the vertical link and to the :issociated type bnr, und means tending to dra-W seid vertical link forwardly when a key is depressed, a full depression of the key moving the vertical link and seid. means to dead center relation with the type bar :it a distance from the platen, from which position it completes its travel by momentum alone, thus reducing noise.

10. In a typewriting4 machine. the combination with key lever and a type bnr, ot a Vertical link pivotelly connected with the key lever, a horizontal linkpivotally connected to the vertical link and to the associated type bar, and n member pivoted t'o the frame and to the vertical` link belov7 its pivotal connection with the horizontal link, a. -full depression of the key leverl moving the vertical link to a position in Which its ends are in a Straight line with the pivot of said member.

l1. In :i typewriting machine, the combination Vwith e. key lever and :L type bei', of :i link pivot-ally connected to the key lever, :i second link pivotally connected with the first link und with its associated type ber.I and pivotally mounted means pivoted to the irst link and tending to draw it forward when a key is depressed, :i full depression of the key moving the vertical link and said means to dead center relation und the type bar to :i position in front of the platen and at a. considerable distance therefrom, from "which position it completes its travel byY momentum alone, thus reducing noise.

In testimony whereof, I have hereunto subscribed my name. Y

EDWARD 13. nnss. 

